Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 105,680	$ 85,376	$ 85,376
ACL on PCD Loans		2,037
Charge-offs	(1,758)	(743)	(1,585)
Recoveries	170	1,174	1,907
Provision for (Benefit from) Credit Losses	4,315	8,205	17,945
Ending Balance	108,407	96,049	105,680
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning Balance	4,315	3,790	3,790
ACL on PCD Loans		0
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit from) Credit Losses	(120)	125	525
Ending Balance	4,195	3,915	4,315
Credit Loss [Roll Forward]
Beginning Balance	109,995	89,166	89,166
ACL on PCD Loans		2,037
Charge-offs	(1,758)	(743)	(1,585)
Recoveries	170	1,174	1,907
Provision for (Benefit from) Credit Losses	4,195	8,330	18,470
Ending Balance	112,602	99,964	109,995
ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		2,037	2,037
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning Balance		0	0
Credit Loss [Roll Forward]
Beginning Balance		2,037	2,037
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	61,381	51,140	51,140
ACL on PCD Loans		1,573
Charge-offs	0	(294)	(294)
Recoveries	0	0	3
Provision for (Benefit from) Credit Losses	3,556	2,573	8,959
Ending Balance	64,937	54,992	61,381
Commercial real estate \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		1,573	1,573
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	24,639	23,474	23,474
ACL on PCD Loans		144
Charge-offs	(184)	(119)	(594)
Recoveries	116	286	743
Provision for (Benefit from) Credit Losses	325	(106)	872
Ending Balance	24,896	23,679	24,639
Consumer \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		144	144
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	13,597	3,862	3,862
ACL on PCD Loans		81
Charge-offs	(1,574)	(330)	(697)
Recoveries	53	887	1,157
Provision for (Benefit from) Credit Losses	(7)	4,542	9,194
Ending Balance	12,069	9,042	13,597
Commercial and industrial \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		81	81
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	5,142	5,667	5,667
ACL on PCD Loans		201
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit from) Credit Losses	513	1,569	(726)
Ending Balance	5,655	7,437	5,142
Construction \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		201	201
Agriculture production
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	906	1,215	1,215
ACL on PCD Loans		38
Charge-offs	0	0	0
Recoveries	1	1	4
Provision for (Benefit from) Credit Losses	(74)	(371)	(351)
Ending Balance	833	883	906
Agriculture production \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		38	38
Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	15	18	18
ACL on PCD Loans		0
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit from) Credit Losses	2	(2)	(3)
Ending Balance	17	16	15
Leases \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		0	0
CRE non-owner occupied \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	30,962	25,739	25,739
ACL on PCD Loans		746
Charge-offs	0	0	0
Recoveries	0	0	1
Provision for (Benefit from) Credit Losses	2,001	1,570	4,476
Ending Balance	32,963	28,055	30,962
CRE non-owner occupied \| Commercial real estate \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		746	746
CRE owner occupied \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	14,014	10,691	10,691
ACL on PCD Loans		63
Charge-offs	0	0	0
Recoveries	0	0	2
Provision for (Benefit from) Credit Losses	545	1,317	3,258
Ending Balance	14,559	12,071	14,014
CRE owner occupied \| Commercial real estate \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		63	63
Multifamily \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	13,132	12,395	12,395
ACL on PCD Loans		0
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit from) Credit Losses	741	(408)	737
Ending Balance	13,873	11,987	13,132
Multifamily \| Commercial real estate \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		0	0
Farmland \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	3,273	2,315	2,315
ACL on PCD Loans		764
Charge-offs	0	(294)	(294)
Recoveries	0	0	0
Provision for (Benefit from) Credit Losses	269	94	488
Ending Balance	3,542	2,879	3,273
Farmland \| Commercial real estate \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		764	764
SFR 1-4 1st DT liens \| Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	11,268	10,723	10,723
ACL on PCD Loans		144
Charge-offs	0	0	0
Recoveries	0	40	79
Provision for (Benefit from) Credit Losses	652	(238)	322
Ending Balance	11,920	10,669	11,268
SFR 1-4 1st DT liens \| Consumer \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		144	144
SFR HELOCs and junior liens \| Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	11,413	10,510	10,510
ACL on PCD Loans		0
Charge-offs	(42)	0	(22)
Recoveries	65	175	429
Provision for (Benefit from) Credit Losses	(522)	158	496
Ending Balance	10,914	10,843	11,413
SFR HELOCs and junior liens \| Consumer \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		0	0
Other \| Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	1,958	2,241	2,241
ACL on PCD Loans		0
Charge-offs	(142)	(119)	(572)
Recoveries	51	71	235
Provision for (Benefit from) Credit Losses	195	(26)	54
Ending Balance	$ 2,062	2,167	1,958
Other \| Consumer \| ACL of PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance		$ 0	$ 0

Credit Loss, Allowance For Credit Loss

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Credit Loss, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase

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Credit Loss, Allowance For Credit Loss, Recovery

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Credit Loss, Allowance For Credit Loss, Writeoff

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Off-Balance Sheet, Credit Loss, Purchased with Credit Deterioration, Increase

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Off Balance Sheet, Credit Loss, Recovery

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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-Name Accounting Standards Codification
-Topic 326
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Amount of increase in allowance for credit loss on financing receivable purchased with credit deterioration.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

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Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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